I haven't been following your post, as it progressed, as I just joined the forum. None the less, you have come up with a very nice and interesting look with your "CS Trail Hawk",... In my eye's, it lends to a some what military look.
I have carried and used tomahawks for dozens of years in throwing competition and use in packing into the woods. One thing for sure is that after a few trips into the woods, they never look like they do on that first day right out of the box, or as they do the day they are finished from the modification(s).
I would always take the brightness out of a new hickory handle with a good oil stain,... not so much as a fashion statement, but rather to help to protect the wood handle from the elements.
As far as the head goe's,... I always leave them in the white (the natural metal finish), as they will darken with age and use. If I put anything on them, it would be a very light coat of linseed oil. You will always scratch the head of up, no matter what type of coating that you use,... as the only way to keep them shinny bright is to hang it on the wall to look at. Even then, a good carbon steel will gather rust (depending on where you live and what the climate is like).
None the less, you have put a labor of love into your tomahawk, it looks great, keep up the good work!